Datasets:

animicaorg
/

x402-price-index

date stringdate 2026-08-19 00:00:00 2026-09-07 00:00:00	probes int64 16 13.7k	distinct_hosts int64 6 1.44k	paywalled int64 5 13k	open int64 0 410	dead int64 1 509	blocked int64 0 410	error int64 0 322	priced_endpoints int64 1 7.06k	median_price_usd float64 0 1.01	p25_price_usd float64 0 0.05	p75_price_usd float64 0.01 2	median_latency_ms int64 28 325
2026-08-19	2,140	417	1,117	410	509	16	88	526	0.05	0.02	0.1	142
2026-08-20	25	11	17	5	2	0	1	2	0.007	0.004	0.01	113
2026-08-21	16	6	5	3	8	0	0	1	0.01	0.01	0.01	139
2026-08-22	45	13	30	3	1	9	2	10	0.004	0.004	0.006	182
2026-08-23	60	13	56	0	3	1	0	46	0.01	0.01	0.09	151
2026-08-24	51	21	25	7	2	3	14	2	1.005	0.01	2	112
2026-08-25	19	11	11	5	1	2	0	5	0.1	0.05	0.1	325
2026-08-26	3,097	433	2,938	17	6	39	97	1,542	0.01	0.003	0.0324	180
2026-08-27	83	47	46	26	2	6	3	16	0.01	0.01	0.03	267
2026-08-28	49	17	43	3	2	0	1	39	0.01	0.001	0.09	136
2026-08-29	85	20	82	1	2	0	0	29	0.008	0.003	0.02	233
2026-08-30	59	15	42	4	8	0	5	30	0.005	0.005	0.02	139
2026-08-31	700	111	653	5	8	4	30	207	0.005	0.005	0.005	71
2026-09-01	563	134	531	7	5	0	20	376	0.005	0.003	0.005	126
2026-09-02	13,746	1,440	12,968	13	33	410	322	7,063	0.01	0.003	0.05	145
2026-09-03	1,827	240	1,774	10	2	4	37	1,497	0.004	0.003	0.005	146
2026-09-04	629	165	586	5	2	7	29	414	0.005	0.005	0.01	123
2026-09-05	1,067	211	961	73	1	0	32	454	0.01	0.0018	0.15	163
2026-09-06	1,822	202	1,750	13	4	16	39	1,259	0.02	0.02	0.02	28
2026-09-07	283	47	211	0	2	0	70	88	0.005	0.002	0.02	142

x402 Price Index — a census of the machine-payable web

Most directories of x402 services list what merchants claim. This dataset records what their endpoints actually answer when probed: the HTTP 402 challenge they return, the price inside it, the chain and asset they want, and whether they respond at all.

It is built by Animica from an independent prober that walks every x402 endpoint it can discover and reads each merchant's own accepts[] block. No merchant self-reporting is involved, and the prober never pays — a 402 is the successful result.

Coverage


Probe observations	26,366
Distinct hosts	2,509
Distinct endpoints	26,366
Window	2026-08-19 → 2026-09-07 (ongoing, ~600–1,800 new probes/day)
Endpoints with a machine-readable price	13,648
Median price	$0.01

Outcomes: paywalled 23,888 · error 748 · open 610 · dead 603 · blocked 517

Networks: Base (eip155:8453) 9,305 · base 4,105 · amanchain 135 · Base Sepolia 63 · Solana 21 · Polygon 1

What is in this repo

This is the free tier — enough to evaluate the data and to track the market:

data/sample/daily_index.csv — the daily index: probes, live hosts, outcome split, median/p25/p75 price and median latency per day. This is the headline series.
data/sample/mesh_probes_sample.csv — 1,000 probe rows, stratified by outcome and deterministically sampled, with the free columns.
data/sample/stats.json — machine-readable summary of the full corpus.

The full corpus adds every row plus the columns that make it actionable: resource, price_atomic, pay_to, the raw accepts_json (the merchant's complete published payment terms), and the prober's error diagnosis. See Full dataset below.

Why this is hard to reproduce

Building it requires discovering endpoints that are not in any directory, probing each one without paying, parsing non-conformant 402 bodies, and doing it repeatedly so that dead and blocked become meaningful. The value compounds with time: a snapshot tells you today's prices, the series tells you who raised them, who died, and who is new.

Deliberate omissions

Scraped merchant prose is not included. A price published in a 402 response is a fact about a public endpoint; a merchant's marketing copy is their copyrighted text. Only structured facts are distributed here.

Full dataset

The complete corpus — every probe row plus resource, price_atomic, pay_to, the raw accepts_json and the prober's error diagnosis — is available as a monthly subscription.

$29/month · Subscribe with PayPal

After subscribing, PayPal shows a subscription id beginning I-. Exchange it for a download token:

curl -X POST https://animica.dev/api/mkt/v1/data/x402-index/activate \
  -H 'content-type: application/json' \
  -d '{"subscriptionId":"I-YOUR-SUBSCRIPTION-ID"}'

The response carries direct URLs for both formats:

curl -o x402-price-index.csv \
  "https://animica.dev/api/mkt/v1/data/x402-index/download?file=csv&token=YOUR_TOKEN"

file=csv (~~23MB) or file=jsonl (~~28MB). Tokens last 30 days and can be reminted at any time; entitlement is re-checked against PayPal on every download, so cancelling stops access immediately. Files are rebuilt as the census grows — re-download for the latest.

Questions: open a discussion on this repo.

Citation

Animica (2026). x402 Price Index — a census of the machine-payable web.
https://huggingface.co/datasets/animicaorg/x402-price-index

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